It is important to have functioning brakes on the trailer when you are towing a car or recreated vehicle. Some trailers rely on the tow vehicle’s brakes to stop, whereas other trailers have their own brake system. These controllers supply power from the tow vehicle to the trailer’s brake system. This article will tell you how to wire trailer brakes.
Steps
1.Find the cold side of the “stoplight” switch by probing the terminals until one is lit
when the brake pedal is depressed. Male the cold wire.
The “stoplight” switch is located on the brake pedal and activates the brake lights.
2.Disconnect the negative battery cable of the tow vehicle. Install a 2 0amp auto-reset
circuit breaker as close as possible to the positive battery terminal.
3.Use ring terminal connectors to connect the “BATT”side of the breaker to the
terminal.
4.String through one black and one white wire from the brake pedal to the tow
vehicle’s battery.
5.Connect the black wire to the “AUX”side of the circuit breaker with a ring terminal
and connect the white wire to the negative battery cable with another ring terminal.
6.Attach the brake controller’s black “battery” wire to the black wire on the “AUX’
side of the circuit breaker with a butt connector.
7.Attach the controller’s white “ground” wire to the white wire from the negative
battery terminal.
8.Splice the red “stoplight” wire to the cold wire determined in step 1 using wire
strippers and the wiretap provided with your controller.
9.Attach the brake control’s blue wire to the trailer’s blue brake wire. Secure loose
wires with cable ties so they will not be damaged in transit.
10.Consult your vehicle’s manual for special instructions on reconnecting the battery
for towing.
